Vertical 9:16, one continuous five-second shot. Consistent character identity, clothing, anatomy and object shapes. Restrained believable motion, clean composition, stable lighting, no cuts, no written text, no logos, no captions, no dialogue. Photorealistic selected adult woman in a modest light blue dress behind a small cake table. Both hands resting on the table far from candles, gentle welcoming smile, subtle head turn, warm private birthday gathering style, no crowd or spoken words.